GFP frame filter

摘要

A GFP frame filter is provided to filter GFP frame data based on extracted GFP header data. The header data comprises EXI, PTI, and UPI fields. The header data can also comprise a generic header that can be customized to provide additional GFP frame filtering applications. The GFP frame filter comprises a plurality of programmable filters arranged to process GFP header data in parallel according to various programmable filter configurations. The plurality of programmable filters can be configured to operate in conjunction in a particular sequence.

主权项

1. A method of filtering Generic Framing Procedure (GFP) data of a GFP frame, the method comprising:
receiving a filter configuration at each of a plurality of programmable filters; receiving GFP header data of the GFP frame at each of the plurality of programmable filters; processing the GFP header data using the plurality of programmable filters, wherein the processing at each filter is based on the filter configuration for the respective filter, wherein the filter configuration includes a next filter indicator, and wherein the processing at each filter further includes comparing received GFP header data to a value indicated in the respective filter configuration; outputting a filter result at each programmable filter based on the processing at the respective programmable filter; and evaluating the filter results at an evaluation stage, the evaluating comprising:
evaluating the filter results in an order based on the next filter identifiers in the filter configurations of the programmable filters; andexecuting an action for the GFP frame based on the evaluating the filter results, where the action is specified in the filter configuration of at least one of the plurality of programmable filters.